casa-mp-base

synergy: update to 1.10.3

* OpenSSL 1.1 compatibility
* gmock/gtest are now unzipped [1]
* patch-CMakeLists.txt.diff no longer needed as those lines are removed
  upstream [2]
* Updated handling of OpenSSL after [3]; uses dynamic linking
* patch-src-lib-platform-OSXScreen.mm.diff no longer needed [4]
* Remove other unused patches

[1] https://github.com/symless/synergy-core/commit/d37920364d849464503d7edfbdea9367539e5901
[2] https://github.com/symless/synergy-core/commit/e779b2b49a16def63cf1a047b2fd311ce945e060
[3] https://github.com/symless/synergy-core/commit/c79ef74392843182ab4a34b807ca603776e50779
[4] https://github.com/symless/synergy-core/commit/72c394208f71e4156334793e2d2642ba534f9f5a

Closes: https://trac.macports.org/ticket/59049